87831466 has 4 divisors (see below), whose sum is σ = 131747202. Its totient is φ = 43915732.

The previous prime is 87831427. The next prime is 87831467. The reversal of 87831466 is 66413878.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 48706441 + 39125025 = 6979^2 + 6255^2 .

It is not an unprimeable number, because it can be changed into a prime (87831467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21957865 + ... + 21957868.

Almost surely, 2^87831466 is an apocalyptic number.

87831466 is a deficient number, since it is larger than the sum of its proper divisors (43915736).

87831466 is a wasteful number, since it uses less digits than its factorization.

87831466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43915735.

The product of its digits is 193536, while the sum is 43.

The square root of 87831466 is about 9371.8443222239. The cubic root of 87831466 is about 444.5118849373.

The spelling of 87831466 in words is "eighty-seven million, eight hundred thirty-one thousand, four hundred sixty-six".